package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;


import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.concurrent.TimeUnit;
import java.util.UUID;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private StringRedisTemplate redisTemplate;
    @Autowired
    private SystemUserMapper systemUserMapper;
    @Override
    public CaptchaVo getCaptcha() {

        // 创建一个130*48像素，包含4个字符的验证码实例
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        // 设置验证码字符类型为默认类型（数字和字母混合）
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        // 获取验证码文本内容并转换为小写
        String code = specCaptcha.text().toLowerCase();
        // 构造Redis存储的键名，使用UUID确保唯一性
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();
        // 将验证码图像转换为Base64编码格式
        String image = specCaptcha.toBase64();
        // 将验证码文本存储到Redis中，并设置过期时间
        redisTemplate.opsForValue().set(key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        // 返回包含验证码图像和键名的CaptchaVo对象
        return new CaptchaVo(image, key);
    }

    @Override
    public String login(LoginVo loginVo) {
        if (!StringUtils.hasText(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }

        String code = redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (code == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }

        if(!code.equals(loginVo.getCaptchaCode().toLowerCase())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        LambdaQueryWrapper<SystemUser> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserMapper.selectOne(queryWrapper);
        if (systemUser == null){
            throw new  LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        if(systemUser.getStatus() == BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        if(!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        return JwtUtil.createToken(systemUser.getId(),systemUser.getUsername());
    }

    @Override
    public SystemUserInfoVo getSystemUserInfoById(Long userId) {
        SystemUser systemUser = systemUserMapper.selectById(userId);
        SystemUserInfoVo systemUserInfoVo =new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }
}
